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[image][online_image][animation] Fix transparency in RGB565 (#7631)

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Clyde Stubbs authored and GitHub committed 2024-10-25 11:05:25 +13:00
1 parent 09f9d91577
commit 33fdbbe30c
15 files changed
+101 -291
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esphome/components/image/image.cpp
+14 -14
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@@ -88,7 +88,7 @@ lv_img_dsc_t *Image::get_lv_img_dsc() {
this->dsc_.header.reserved = 0;
this->dsc_.header.w = this->width_;
this->dsc_.header.h = this->height_;
this->dsc_.data_size = image_type_to_width_stride(this->dsc_.header.w * this->dsc_.header.h, this->get_type());
this->dsc_.data_size = this->get_width_stride() * this->get_height();
switch (this->get_type()) {
case IMAGE_TYPE_BINARY:
this->dsc_.header.cf = LV_IMG_CF_ALPHA_1BIT;
@@ -104,17 +104,17 @@ lv_img_dsc_t *Image::get_lv_img_dsc() {
case IMAGE_TYPE_RGB565:
#if LV_COLOR_DEPTH == 16
this->dsc_.header.cf = this->has_transparency() ? LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED : LV_IMG_CF_TRUE_COLOR;
this->dsc_.header.cf = this->has_transparency() ? LV_IMG_CF_TRUE_COLOR_ALPHA : LV_IMG_CF_TRUE_COLOR;
#else
this->dsc_.header.cf = LV_IMG_CF_RGB565;
#endif
break;
case image::IMAGE_TYPE_RGBA:
case IMAGE_TYPE_RGBA:
#if LV_COLOR_DEPTH == 32
this->dsc_.header.cf = LV_IMG_CF_TRUE_COLOR;
#else
this->dsc_.header.cf = LV_IMG_CF_RGBA8888;
this->dsc_.header.cf = LV_IMG_CF_TRUE_COLOR_ALPHA;
#endif
break;
}
@@ -147,21 +147,21 @@ Color Image::get_rgb24_pixel_(int x, int y) const {
return color;
}
Color Image::get_rgb565_pixel_(int x, int y) const {
const uint32_t pos = (x + y * this->width_) * 2;
uint16_t rgb565 =
progmem_read_byte(this->data_start_ + pos + 0) << 8 | progmem_read_byte(this->data_start_ + pos + 1);
const uint8_t *pos = this->data_start_;
if (this->transparent_) {
pos += (x + y * this->width_) * 3;
} else {
pos += (x + y * this->width_) * 2;
}
uint16_t rgb565 = encode_uint16(progmem_read_byte(pos), progmem_read_byte(pos + 1));
auto r = (rgb565 & 0xF800) >> 11;
auto g = (rgb565 & 0x07E0) >> 5;
auto b = rgb565 & 0x001F;
Color color = Color((r << 3) | (r >> 2), (g << 2) | (g >> 4), (b << 3) | (b >> 2));
if (rgb565 == 0x0020 && transparent_) {
// darkest green has been defined as transparent color for transparent RGB565 images.
color.w = 0;
} else {
color.w = 0xFF;
}
auto a = this->transparent_ ? progmem_read_byte(pos + 2) : 0xFF;
Color color = Color((r << 3) | (r >> 2), (g << 2) | (g >> 4), (b << 3) | (b >> 2), a);
return color;
}
Color Image::get_grayscale_pixel_(int x, int y) const {
const uint32_t pos = (x + y * this->width_);
const uint8_t gray = progmem_read_byte(this->data_start_ + pos);